Chase it round the garden
In the garden. -But I don't see her. -Oh, you just have to dig a little.
Chard remains.
Me: Like 4 maybe. 5 tops. Wife: I counted 19. Me: Well I rounded down.
You use a cow-culator. Or you round them up. Or any other method the commenters want.
Snow Petrol!
For the same reason dogs chase cars they have no intention of driving...